With just two weeks remaining to the running of the GI Kentucky Derby, the Saturday worktab at Churchill Downs was dotted with the names of top sophomores headed towards the first jewel of racing's Triple Crown. Godolphin's reigning Eclipse Award-winning juvenile colt and 'TDN Rising Star' Essential Quality (Tapit) took to the Churchill main track at 5:15 a.m. with big-race rider Luis Saez in from Keeneland to put the colt through his paces. The homebred went five furlongs in :59.60 after breaking off about a length behind 4-year-old stablemate Spa...